Insulator.



UNITED STATES PATENT OFFICE.

RICHARD H. STERLING, OF PITTSEIELD, MASSACHUSETTS, ASSIGNOR TO THE STANLEY ELECTRIC MANUFACTURING COMPANY, OF SAME PLACE.

lNSULATOR.

SPECIFICATION forming part of Letters Patent NO. 664,301, dated December 18, 1900.

7 Application filed March 14, 1900. Serial No. 8,604:- (No model.

To all whom it may concern: groove G, through which the conductor passes Beitknown that I, RICHARD H. STERLING, a and in which it is secured. About the edge 55 citizen of the United States, residing at Pittsof the part D is a gutter formed by the slopfield, Berkshire county, Massachusetts, have ing sides or rim and the flange H, in which invented certain new and useful Improvethe water collects and from which it flows ments in Insulators, of which the following is through the opening I in line with the electric a full, clear, and exact description. conductor. The sloping sides are substan- 6o Myinvention relates to pole-line insulators tially those of a cone having a base of any or insulators for supporting electrical consuitable shape and so flattened that the pitch IO ductors which are exposed to the weather, of the surface down which the water flows is and has for its object to produce a more eftinot too steep. In my preferred form the cone oient device and one with which arcs are not is flattened, so as to make the radius of its 65 so liable to form as with those now in use. circular base greaterthanits height. In order My invention is particularly useful where to carry the discharge still farther from the very high potentials are used, in which case, pin, I provide a spout J. There would be particularly in wet weather, there is with the some disadvantage mechanically, both in the ordinary insulator great danger of an arc manufacture of the insulator and in trans- 70 forming around theinsulator and between the porting and shipping the same, in having a line and the supporting-pin. This danger is spout always projecting at right angles to the largely due to the fact that in the ordinary gutter. I therefore make the spout separate insulator the moisture or rain collects and and attachable, forming a groove K therein, falls in drops or small streams, by which, as in which fits a corresponding portion of the 7 is well known, a much larger amount of elecgutter flange at the opening I, as shown.

tricity is carried than would be by a single The two parts can then be shipped separately,

stream of a quantity equal to the combined the spouts being attached when desired, a

drops or streams. The potential of the air waterproof cement being used to niakea tight I around the pin is accordingly raised and as joint. 8d a consequence arcing to the pin is facilitated. It will be seen that with insulators embody- Moreover, drops or small streams from an in ing my invention the water is not permitted o sulator when charged with electricity are atto drop or run off at many points, but is coltracted toward the pin on which the insulator lected and discharged at definite points, so as is supported and are also easily blown toward to interfere with the insulating function as it by the wind. I have therefore made inlittle as possible. sulators with gutters which collect the water What I claim is- 55 and discharge it in large streams at definite 1. An insulator having an upper surface in points, and in order to still further lessen the the form of a flattened cone and a substandanger I preferably add spouts which shall tially vertical flange aboutits edgeforminga o deliver the water at a greater distance from gutter for collecting and discharging the wathe supporting-pins. ter from said surface.

0 The following is a description of an insu- 2. An insulator having an upwardly-prolator embodying my invention, reference bejecting flange about its edge forminga gutter ing had to the accompanying drawings, in and means for discharging collected water 5 whichsaid means extending a distance from said Figure 1 is a view partly in elevation and flange.

5 partly in section. Fig. 2 is a plan view, and 3. An insulator having on its uppersurface Fig. 3 is a front view of the upper part. at its edge a gutter and a detachable spout Referring more particularly to the drawleading from said gutter, substantially as deings, A is a hat-shaped insulator, of porcelain scribed.

or other suitable non-conducting material, Signed March 10, 1900.

50 mounted upon the pin B and consisting of a RICHARD H. STERLING.

petticoat C and a top piece D, connected to- \Vitnesses: getherbycennent pouredinto grooves E. The CHARLES E. DORE,

top piece has a knob or crown F, with the JOHN F. KELLY. 

